Nothing shows up on the screen but it turns on?

Hook it up to an external monitor to try to trace where the problem is. Along with the external monitor, try booting from the original system installation disk. Can you see the desktop faintly? Why did you re-place the screen and cable and where did those parts come from and are you sure they're correct?

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i can't see anything on the display and that is why i bought a new screen and cable.

how do i hook it up to an external monitor if i can't see anything on the display screen (i dont know the quick keys for it to show on the external screen)

26 мар 2012 г. из Danny

Use the side DVI port with an external monitor, it may light right up. If you can only find a VGA monitor you will need an adapter such as this: DVI to VGA Adapter

27 мар 2012 г. из mayer

it didn't work so what does that mean?

27 мар 2012 г. из Danny

Most likely your NVIDIA GeForce 8600M GT video processor has failed. Apple has a recall on this so if you were getting color artifacts on the screen before it went out, call Apple and tell them about the artifacts and that it went out afterwards and they will replace your logic board for free.

27 мар 2012 г. из mayer

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i can't see anything on the display and that is why i bought a new screen and cable.

how do i hook it up to an external monitor if i can't see anything on the display screen (i dont know the quick keys for it to show on the external screen) — Danny
Use the side DVI port with an external monitor, it may light right up. If you can only find a VGA monitor you will need an adapter such as this: DVI to VGA Adapter — mayer
Most likely your NVIDIA GeForce 8600M GT video processor has failed. Apple has a recall on this so if you were getting color artifacts on the screen before it went out, call Apple and tell them about the artifacts and that it went out afterwards and they will replace your logic board for free. — mayer